Some chan_dahdi protected function renaming.

analog_lib_handles --> dahdi_analog_lib_handles
enable_dtmf_detect --> dahdi_dtmf_detect_enable
disable_dtmf_detect --> dahdi_dtmf_detect_disable
dahdi_enable_ec --> dahdi_ec_enable
dahdi_disable_ec --> dahdi_ec_disable
update_conf --> dahdi_conf_update
dahdi_link --> dahdi_master_slave_link
dahdi_unlink --> dahdi_master_slave_unlink

(closes issue ASTERISK-22129)
Reported by: rmudgett


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@395167 f38db490-d61c-443f-a65b-d21fe96a405b